Hello,
Please confirm minimum operating voltage for RTC in Verdin iMX8M Plus QuadLite 1GB IT.
Regards,
Parimal
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RTC Minimum Operating Voltage for Verdin iMX8M Plus
Recommended Operation Conditions
According to the Verdin iMX8M Plus V1.1 datasheet, the minimum operating voltage for the RTC backup power supply is 1.1V(1).
The specific technical specification from Section 8.2 shows:
| Symbol | Description | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|---|
| VCC_BACKUP | RTC power supply | 1.1 | 3.0 | 5.5 | V |
RTC Configuration Details
The Verdin iMX8M Plus module features an onboard RTC IC that can maintain timekeeping when the main power supply is removed(2). The RTC backup power is supplied through the VCC_BACKUP pin (pin 249)(2).
When the module’s main voltage is available, the onboard RTC can recharge a supercapacitor or rechargeable battery via the VCC_BACKUP pin with a very low charging current (< 500µA at 3V)(2).
Important Note: When using the recharging capabilities of the onboard RTC, a current-limiting resistor with a value >47kΩ must be added between the battery and VCC_BACKUP(2). Using a resistor with lower resistance will cause the module to fail to boot(2).
This specification applies to all variants of the Verdin iMX8M Plus family, including the QuadLite 1GB IT model you mentioned.
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Please confirm minimum operating current for battery operation.
